What the best headphone for electronic music mixing? Can I use my profire 2626 as amplifier?

Hello guys,
First, id like to thank you for all support in this forum!
Im a begginer in mixing issues. Basically, i work with eletronic music and I want to buy a headphone to mix my electronic songs. I already have a profire 2626 and macbook. I heard about the sennheiser hd 650 and the BT880. I really want to know your opinion about it and if can use my profire 2626 as a headphone amplifier, without lost quite quality. Best regards!